Heat-dissipating component and method for manufacturing same

1. A manufacturing method of a heat-dissipating component, comprising forming a plate-shaped molded body having notch portions and comprising silicon carbide, disposing inorganic fibers at the notch portions of the molded body, forming a composited portion and hole-formation portions by impregnating the molded body and the inorganic fibers with an aluminum-containing metal, and cutting out the molded body in the shape of a plate-shaped heat-dissipating component, wherein the cutting out the molded body comprises cutting a portion of the composited portion and the hole-formation portions, wherein each of the hole-formation portions forms a part of an outer peripheral surface of the heat-dissipating component, the entirety of the hole-formation portions contains inorganic fibers at a volume of 3-30%, such that at least one portion of the outer peripheral surface of the heat-dissipating component comprises the inorganic fibers, and the inorganic fibers comprise crystalline alumina fibers having an alumina content of 70% or more.

2. The manufacturing method of a heat-dissipating component according to claim 1 , further comprising providing through holes in the hole-formation portions.

3. The manufacturing method of a heat-dissipating component according to claim 1 , wherein the relative density of the molded body is 55-75%.

4. The manufacturing method of a heat-dissipating component according to claim 1 , wherein the aluminum-containing metal comprises from 0.9 to 1.5 mass % of magnesium and from 1 to 18 mass % of silicon.